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IMPACT OF DAMAGE BY THE DRIEDFRUIT MOTH, VITULA EDMANDSAE SERRATILINEELLA (LEPIDOPTERA: PYRALIDAE), A PEST OF THE ALFALFA LEAFCUTTER BEE, MEGACHILE ROTUNDATA (HYMENOPTERA: MEGACHILIDAE)

Published online by Cambridge University Press:  31 May 2012

K. W. Richards
K. W. Richards
Affiliation:
Research Station, Agriculture Canada, Lethbridge, Alberta T1J 4B1
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Abstract

Larvae of the driedfruit moth, Vitula edmandsae serratilineella Ragonot, enter uncapped tunnels in hives of the alfalfa leafcutter bee, Megachile rotundata F., and eat the pollen and nectar provisions of incomplete cells. Significantly more cocoons are destroyed in hives made of pine nesting material than in those made of polystyrene nesting material. However, significantly more tunnel walls are chewed into and through in the polystyrene than in the wood material. A significant positive relationship exists between the number of moth larvae per hive and the number of bee cells produced in that hive. After hives are removed from the field and placed in storage for the winter, most mature larvae leave the tunnels upon completion of feeding and aggregate in spaces between hives.

Résumé

Les larves de la pyrale, Vitula edmandsae serratilineella Ragonot, entrent dans les galeries non bouchées des ruches de la découpeuse de la luzerne, Megachile rotundata F., pour manger les réserves de pollen et de nectar accumulées dans les cellules incomplètes. Significativement plus de cocons sont détruits dans les ruches faites en pin comparativement au polystyrène. Par contre, on constate un nombre significativement supérieur de murs de galeries rongés et percés dans le polystyrène comparativement au bois. Un rapport positif significatif existe entre le nombre de larves de pyrale par ruche et le nombre de cellules produites dans la ruche. Quand les ruches sont remisées pour l'hiver, la plupart des larves matures quittent les galeries après qu'elles ont cessé de se nourrir et se rassemblent dans les espaces entres les ruches.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 12 , December 1983 , pp. 1549 - 1553
Copyright
Copyright © Entomological Society of Canada 1983

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